Qatari efforts to broker a diplomatic breakthrough between the U.S. and Iran have stalled, with neither side showing willingness to compromise, according to three sources familiar with the talks. Mediator Ali al-Thawadi discussed a two-page proposal with Iranian Foreign Minister Abbas Araghchi and his team in New York, then met Trump envoy Jared Kushner and other U.S. officials in Washington, with Vice President Vance attending part of the meeting. The plan sought to address Iran's demand to lift the U.S. naval blockade and Washington's demand for Iranian nuclear concessions. U.S. officials initially described the discussions as positive and said President Trump was open to sanctions relief and releasing frozen funds for concrete nuclear steps, but Trump later said he had offered Iran nothing. The impasse is reinforcing concerns on both sides that renewed military conflict could become more likely, including the possibility that Trump could order a return to major combat operations after the midterms. Iran says it will consider nuclear concessions only after the U.S. returns to the June memorandum of understanding, while Iran's Secretary of the Supreme National Security Council, Mohsen Rezaei, accused Trump of being unable to decide. Trump said the goal was to prevent Iran from obtaining a nuclear weapon.